Big screen smokers: Smoking in movies is up, especially in films rated G, PG or PG-13 and accessible to kids, a new study shows. The study looked at the 134 top-grossing movies in 2011 and found that they contained 1,900 portrayals of smoking or other tobacco use. That's up 7% overall from 2010 and the increase was 36% in movies kids can see in theaters. Films that showed tobacco use included "The Help" (rated PG-13) and "Rango" (rated PG). (Los Angeles Times)

HIV care: Poor people with HIV who get comprehensive care -- not just medications, but help with problems such as homelessness and lack of transportation -- can live longer, healthier lives, a 15-year study shows. A well-cared-for patient diagnosed in their late 20s can expect to live into their 70s, researchers say. (Reuters)

Miscarriage test: A blood test for levels of the hormone progesterone may be able to identify which pregnant women with worrisome symptoms such as bleeding and pain will miscarry and which still have viable pregnancies, new research shows.(MedPage Today)

Today's talker: Are celebrities who raise awareness and money for certain diseases good or bad for our health? A pair of public health experts debate the question this week in the journal BMJ -- with one saying stars bring attention to neglected causes and the other saying the stars mostly bring attention to themselves and, sometimes, to bogus treatments. Time has it both ways with a list of celebrities who help (Michael J. Fox on Parkinson's disease) and harm (Oprah Winfrey on Optifast).